After reloading the page the language is set to default locale

[AliakseiMatsuk]

After reloading the page the language is set to default locale

[MikeBellika]

Hi @BobbieGoede. I have made a minimal reproduction at https://github.com/MikeBellika/nuxti18nrepro/. Let me know if there's more I can do to help.
Note that the bug doesn't seem to reproduce on stackblitz. I had to run it on my machine to get it to fail.

PS. As @AliakseiMatsuk said 3.1.1 seems to work and 3.2.0 also works

[MikeBellika]

I think I've found a fix. Setting the locales option in nuxt.config seems to be required. I've made a branch on my reproduction repo, where you can see the fix: https://github.com/MikeBellika/nuxti18nrepro/blob/3d4615be16322a356e8d6f86fae5e1e4d8682338/nuxt.config.ts#L8

export default defineNuxtConfig({
  devtools: { enabled: true },
  modules: ["@nuxtjs/i18n"],
  i18n: {
    vueI18n: "./i18n.config.ts",
    strategy: "no_prefix",
    locales: ["en", "fr"], // <--- Important
  },
});

I think it's probably caused by this line:

i18n/src/runtime/internal.ts

Line 132 in 6223696

if (localeCodes.includes(localeCode)) {

There's mention in the docs about setting the locales option, but it's "hidden" under link localizing, so I missed it. There's also no mention in the changelog that I can see.

@BobbieGoede is this a bug or a docs issue? And let me know if there's something I can do :)

[CoconutTheSlayer]

I can confirm that it is not working on 8.3.0 and on 8.1.1 it works just fine, this issue took me like 2 hours to solve before I found this.

[github-actions]

Would you be able to provide a reproduction? 🙏

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[botafi]

Started a new project still not working